Immobilization of DNA on carbon fiber microelectrodes by using overoxidized polypyrrole template for selective detection of dopamine and epinephrine in the presence of high concentrations of ascorbic acid and uric acid

The Analyst ◽  
2005 ◽  
Vol 130 (3) ◽  
pp. 391 ◽  
Author(s):  
Xiaohua Jiang ◽  
Xiangqin Lin
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Carbon Fiber ◽  
Selective Detection ◽  
Overoxidized Polypyrrole ◽  
High Concentrations ◽  
Carbon Fiber Microelectrodes

Enzymic measurement of cholesterol in serum with the CentrifiChem centrifugal analyzer.

1977 ◽  
Vol 23 (2) ◽  
pp. 280-282 ◽  
Author(s):  
M A Pesce ◽  
S H Bodourian
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Nicotinic Acid ◽  
Cholesterol Oxidase ◽  
Correlation Coefficients ◽  
Cholesterol Esterase ◽  
Hantzsch Reaction ◽  
Rate Method ◽  
High Concentrations ◽  
Enzymic Assay

Abstract Cholesterol is measured by mixing 5 mul of sample with 350 mul of a reagent consisting of phenol, 4-aminoantipyrine, and the enzymes cholesterol oxidase, cholesterol esterase, and peroxidase. After 12 min, the resulting quinoneimine is measured at 520 nm. Readings and cholesterol concentrations are linearly related up to 4.0 g/liter. Lipemic sera and samples containing uric acid (up to 200 mg/liter), hemoglobin (up to 1 g/liter), and certain drugs (clofibrate, phenobarbital, nicotinic acid, Ketochol, Ovral-28), gave no interference. Abnormally high concentrations of bilirubin and ascorbic acid in serum lowered the cholesterol values. This enzymic assay, compared with the method of Abell and with a rate method that uses the Hantzsch reaction, gave correlation coefficients of 0.987 and 989, respectively.

Highly Selective Electrochemical Sensing of Dopamine, Xanthine, Ascorbic Acid and Uric Acid Using a Carbon Fiber Paper

2020 ◽  
Vol 20 (19) ◽  
pp. 11707-11712
Author(s):  
Jaligam Murali Mohan ◽  
Khairunnisa Amreen ◽  
Arshad Javed ◽  
Satish Kumar Dubey ◽  
Sanket Goel
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Carbon Fiber ◽  
Electrochemical Sensing ◽  
Carbon Fiber Paper

Carbon Nanotube-Modified Carbon Fiber Microelectrodes for In Vivo Voltammetric Measurement of Ascorbic Acid in Rat Brain

2007 ◽  
Vol 79 (17) ◽  
pp. 6559-6565 ◽  
Author(s):  
Meining Zhang ◽  
Kun Liu ◽  
Ling Xiang ◽  
Yuqing Lin ◽  
Lei Su ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Carbon Nanotube ◽  
Carbon Fiber ◽  
Rat Brain ◽  
Voltammetric Measurement ◽  
Carbon Fiber Microelectrodes
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